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Sig Sauer P320 9mm SubCompact Caliber X-Change Kit

Convert your P320 to 9mm SubCompact with this Caliber X-Change Kit. This is not compatible with .45 ACP P320's but is compatible with all 9mm, .40 S&W, and .357 Sig P320's.

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Availability: In stock


Note that Sig Sauer recently made an inline design change to the grip shells and slide catch levers. Watch our video below for additional information. We cannot guarantee that you will receive one or the other due to Sig using the same part numbers for the old and new style grip shells, Caliber X-Change Kits, and P250 / P320 firearms.

This is not compatible with .45 ACP P320's.
Specs - More Info
Additional Info
UPC Code 798681543175
Caliber 9mm
Manufacturer Sig Sauer
Overall Length 6.7 in
Overall Height 4.7 in
Sights (detailed) SIGLITE night sights
Sight Radius 5.5 in
Weight Empty 25oz
Frame Finish Polymer
Frame Material Polymer
Slide Finish Nitron
Barrel Length (in) 3.6 in
Mag Capacity / Rounds 12rd
Number of Mags 1
Accessory Rail No
Warranty Warranty provided by Sig Sauer. Warranty information is available for Sig Sauer products at
Customer Reviews (2)
Pricey, but worth it
This exchange kit is expensive, that's on Sig not OCG. Having said that, I'd buy this kit again because it functions perfectly, was shipped rapidly, and gives me essentially a new gun without having to pay for a whole new gun. I'm pleased with this purchase and with OCG, as always. Review by John (Posted on 5/27/2020)
Pretty neat concept
I bought the sub-compact caliber x-change kit for my p320 full sized 9mm. It's made me realize that I prefer the size and grip of the sub-compact to the full size. I had to purchase a medium sized grip module since my hands are big but that allowed me to also get rails on my SC. This lead me to purchase the x-grip mag extender so I can use my 17 round magazines in my SC. I love this setup so much I bought a FCU and now I have two 320's. Shoulda just bought the full firearm to begin with. But it was fun learning and building as I went. So yeah, buy this. Review by Jwotis (Posted on 11/12/2018)
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Product Questions

Product Questions

Does this x-change kit work with the manual safety versions of the P320?

Referenced product: CALX-320SC-9-BSS

This kit should work with a manual safety P320. The grip module will need to be modified (cut / dremeled) to allow the fire control unit with thumb safety lever to properly fit the grip module.

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Does it come with the side catch assembly kit?

Referenced product: CALX-320SC-9-BSS

Response date: 2-7-19

Our current inventory of these kits does include the slide catch lever.

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